a volume control ....

[sakis]

as we speak i have to make a relativelly big installation for a costumer ...

the area is an allday bar that needs a total of 32 speakers seperated at 5 zones this will have to be 8" 2Way min and rated in an absolutelly max of 60W

speakers have to be hifi and the rated power or better say cruise power will be 35 to 40W to litle for pro amps ..and too much to use 100V technolgy ( i dont like the sound of it since its transformer depenting )

since there is not much of this type of amplifiers available in the market for it its either have to be hifi cause pro will be a waste or diy ...

Diy amps will be more cost effective since economics is a mess "cost effective" will be something always in mind

Here is the problem ..
how do you volume control amplifiers that are located 30 meters away ?
i could run shielded quality cables from amps to control pots ( 30 meters) but this will be rather risky since those long cables will run next to many "dirty " other cables add to this the ground loops might created from that ....

of course there is many electronic pots that i can use and control them with DC but i have never used any one in the past and also need to produce circuit and pcb and this is not going to happen in 5 days available ..

so my choise will be to run the system with LDR .... light speeds and the well known circuit can be driven from a DC PSU and a telephone cable as long as the moon ...

any other ideas ?

kind regards sakis

[alex mm]

.... one option could be vicol audio : r-2r volume controller
Alex .

[janneman]

Originally Posted by sakis

as we speak i have to make a relativelly big installation for a costumer ...

the area is an allday bar that needs a total of 32 speakers seperated at 5 zones this will have to be 8" 2Way min and rated in an absolutelly max of 60W

speakers have to be hifi and the rated power or better say cruise power will be 35 to 40W to litle for pro amps ..and too much to use 100V technolgy ( i dont like the sound of it since its transformer depenting )

since there is not much of this type of amplifiers available in the market for it its either have to be hifi cause pro will be a waste or diy ...

Diy amps will be more cost effective since economics is a mess "cost effective" will be something always in mind

Here is the problem ..
how do you volume control amplifiers that are located 30 meters away ?
i could run shielded quality cables from amps to control pots ( 30 meters) but this will be rather risky since those long cables will run next to many "dirty " other cables add to this the ground loops might created from that ....

of course there is many electronic pots that i can use and control them with DC but i have never used any one in the past and also need to produce circuit and pcb and this is not going to happen in 5 days available ..

so my choise will be to run the system with LDR .... light speeds and the well known circuit can be driven from a DC PSU and a telephone cable as long as the moon ...

any other ideas ?

kind regards sakis

I have just the solution for you - RF remote multichannel level control!
You didn't read Linear Audio Vol 1 I guess

PM me for details if you are interested.

jan didden

[wahab]

The low cost solution is to put the amplifiers in the same rack
and simply feed the speakers with the amps outputs..
Just use amplifiers with volume controls..

This eliminate the need for an 230V power rail supplying
eventual amplified speakers wich would need a low level
signal...